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Finding the Fourth Proportional to 158,993.13, 219,400.20 and 91,010.64

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Solution

The fourth proportional to 158,993.13, 219,400.20 and 91,010.64 is: 125,588.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,993.13 : 219,400.20 = 91,010.64 : x
  2. Step 2: Convert to fraction form
    158,993.13/219,400.20 = 91,010.64/x
  3. Step 3: Cross multiply
    158,993.13x = 219,400.20 × 91,010.64
  4. Step 4: Simplify right side
    158,993.13x = 19,967,752,618.13
  5. Step 5: Solve for x
    x = 19,967,752,618.13/158,993.13
  6. Step 6: Final answer
    x = 125,588.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.